One half of the TS Entertainment hip hop duo Untouchable. The group released their debut album, Quiet Storm, in 2008 and would later follow with Who's HOT in 2010.
Untouchable released their first single, "Ready to Shot," in July 2006, though they wouldn't officially debut until 2008 with the song "It's Okay."
From mid-2011 until 2013, he and his bandmate, Kim Sung-won, a.k.a. Sleepy, entered their mandatory military enlistment.
Born Park Kyung-wook, he has been known by the pseudonyms D.Action, The Action, and Jiggy Action.
In 2008, Untouchable's debut album featured the single "I Will Give You Everything" with Song Jieun.